timestamp/protobuf question

docker-compose.yml

version: "3"
services:
  go:
    build: .
    working_dir: /go/src
    volumes:
      - .:/go/src
    command: protoc --go_out=. eg.proto

Dockerfile

FROM golang:alpine

RUN apk add --no-cache git make protobuf
RUN go get github.com/golang/protobuf/protoc-gen-go

eg.proto

syntax = "proto3";

package eg;

import "google/protobuf/timestamp.proto";

message Timestamped {
  google.protobuf.Timestamp stamp = 1;
  int32 count = 2;
}

Doing an apk add protobuf-dev will fix this issue.